Intangible Assets Summary of Intangile Asset Account Activity (Details) (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Finite-Lived Intangible Assets [Line Items]
Beginning balance, intangible assets, gross	$ 759,152	$ 806,256
Intangible assets acquired	10,297	0
Assets no longer in use written off	(8,450)	0
Effect of change In exchange rates	12,263	(33,730)
Ending balance, intangible assets, gross	$ 773,262	$ 772,526
Intangible Assets, Explanation of Significant Deletions	Intangible assets that were written-off had been fully amortized and were no longer in use.